Overall water splitting by graphdiyne-exfoliated and -sandwiched layered double-hydroxide nanosheet arrays

Lan Hui, Yurui Xue (), Bolong Huang, Huidi Yu, Chao Zhang, Danyan Zhang, Dianzeng Jia (), Yingjie Zhao, Yongjun Li, Huibiao Liu and Yuliang Li ()
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Lan Hui: Chinese Academy of Sciences
Yurui Xue: Chinese Academy of Sciences
Bolong Huang: The Hong Kong Polytechnic University
Huidi Yu: Chinese Academy of Sciences
Chao Zhang: Chinese Academy of Sciences
Danyan Zhang: Chinese Academy of Sciences
Dianzeng Jia: Xinjiang University
Yingjie Zhao: Chinese Academy of Sciences
Yongjun Li: Chinese Academy of Sciences
Huibiao Liu: Chinese Academy of Sciences
Yuliang Li: Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract It is of great urgency to develop efficient, cost-effective, stable and industrially applicable electrocatalysts for renewable energy systems. But there are still few candidate materials. Here we show a bifunctional electrocatalyst, comprising graphdiyne-exfoliated and -sandwiched iron/cobalt layered double-hydroxide nanosheet arrays grown on nickel foam, for the oxygen and hydrogen evolution reactions. Theoretical and experimental data revealed that the charge transport kinetics of the structure were superior to iron/cobalt layered double-hydroxide, a prerequisite for improved electrocatalytic performance. The incorporation with graphdiyne increased the number of catalytically active sites and prevented corrosion, leading to greatly enhanced electrocatalytic activity and stability for oxygen evolution reaction, hydrogen evolution reaction, as well as overall water splitting. Our results suggest that the use of graphdiyne might open up new pathways for the design and fabrication of earth-abundant, efficient, functional, and smart electrode materials with practical applications.

Date: 2018
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DOI: 10.1038/s41467-018-07790-x

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